Automatic cut-out mechanism for fluid-actuated devices.



J. H. BECKER.

AUTOMATIC OUT-OUT MECHANISM FOR FLUID AGTUATED DEVICES.

APPLIOATION FILED JAN.21, 1913.

1,078,986. Patented Nov. 18, 1913.

WITNESSES: JNVENTOR COLUMBIA PMNDGRAFN 00.. WASHINGTON. 0, c4

UNITED T @FFIQE.

JULIUS H. BECKER, 0F SALT FRANCISCO, CALIFORNIA.

AUTOMATIC CUT-OUT MECHANISM FOR FLUID-ACTUATED DEVICES.

To all ill/ 10712 it may concern Be it known that I, JULIUs H. Brenna, a citizen of the United States, residing in the city and county of San Francisco and State of California, have invented new and useful Improvements in Automatic Cut-Out Mechanism for Fluiduictuated Devices, of which the following is a specification.

This invention relates to an automatic cut out mechanism for fluid actuated devices, which is particularly adapted for use in connection with hydraulic pumps.

The main object of this invention is to provide a simple, substantial and practical automatic controlling device which may be interposed between the main water supply and a hydraulic pump for the purpose oil cutting oil the supply once the pressure in the main has been reduced below a certain predetermined pressure; the device being so constructed that the automatic action of same may be controlled either by the pri' mary pressure, or by the secondary pressure created by the hydraulic pump.

A further object of the invention is generally to improve this class of devices so as to increase their general applicability, utility and eiliciency.

The invention consists of the parts and the construction and combination of parts as hereinafter more fully described and claimed, having reference to the accompanying drawings, in which-- Figure 1 is a side elevation showing the controlling device in the closed or cut-oii' position. Fig. 2 1S a longitudinal section showing the controlling device in the open position. Fig. 3 shows the installation of the device on a straight pipe line.

The object of this invention is to provide an automatic pump controlling device which will act to entirely cut oil the water under pressure supplied for operating hydraulic pumps when the pressure in the main falls below a predetermined pressure; this being of great importance when the following example is taken under consideration: Supposing that an oil pump delivering oil to a burner in a furnace is direct connected to a hydraulic pump, and that this is constructed to operate under :1 normal pressure of pounds delivered from the water main. Now for some reason or other, the pressure in the main is considerably reduced, which might happen through such causes as the main being subjected to a heavy drain, caused by a tire Specification of Letters Patent.

Application filed January 21, 1913.

Patented N ov. 18, 1913. Serial No. 743,296.

in the immediate vicinity, a bursted pipe, or like cause. A temporary reduction in pressure in the water main would naturally slow down the action of the pump or the number of reciprocal movements of same, and correspondingly reduce the quantity of oil fed to the burner, and in some instances it has happened that the oil supply is reduced to such small quantity as to temporarily extinguish the lire. If the normal pressure of the main should suddenly be restored, the hydraulic pump would immediately actuate the oil i'ecding pump, and the normal discharge would thus be supplied to the burner and discharged into the heated 'l'urnace. If the heat is suilieient within the furnace when a certain proportion of oil has been ejected, a sudden ignition would cause a violent explosion, while it the furnace had cooled down to a certain degree, the oil would simply be injected into the furnace and flood the furnace and overflow into the surrounding qua rtcrs.

The object of this invention, as before stated, is to prevent an accident of this nature by providing an automatic cut out mechanism, which, when the pressure of the main is suddenly decreased, will act to entirely cut oil the water supply to the hydraulic pump, and thus prevent the accidents previously described.

13y referring to Fig. 1 oil the drawings, A indicates the pressure main from which water is supplied through a pipe 2, which in turn is connected with the automatic controlling device generally indicated at B, hefore it enters the hydraulic pump, indicated at C.

D indicates an oil pump of any suitable construction, which is direct connected with the hydraulic pump through a piston rod 3; the oil pump being providiul for the purpose of carrying or elevating oil from any suitable source to an oil burner, not here shown, delivering the oil to the burner through a pipe -lt. interposed on the pipe line -l-, between the oil pump proper and the burner, is a 'l' connection 5, connected by a nipple 6 with a head portion oi. a cylinder 7, in which is slidobly mounted the piston S adjustably secured upon the upper end of a piston rod 9. interposed between the lower cylinder head and the piston 8 is a coil spring 10, which is so positioned that it will Force the piston up into the upper end oi the cylinder 7 whcn the oil pressure actuating the opposite side of the piston is reduced below a certain predetermined pressure, which pressure 18 regulated and controlled byregulatingthe pressure of the spring 10, which in turn is accomplished by adpistlng the position of the piston 8 on the piston rod 9; oil being supplied to the upper end of the cylinder from the pipe line at through the connection 6.

11 indicates a second cylinder which is% open at both ends through which the piston rod 9 extends, and'upon -which=is mounted apalr of opposed or balanced p1stons'12 and Surrounding the open ended cylinder 11 isa casing 1.4 havmg an outlet open1ng 16 and aninlet opening 15; theinlet opening being connected by the pipe 2 to the main, as shown in Fig. 1, while the outlet opening 16 maybe connected as shown to the inlet 17 of the hydraulic pump.

Supposing that'the normal oilpressure in the pipe line 4, which supplies the burner, is'20 pounds, and this oil under pressure, being conveyed fromthepipe 4t through the pipe '6 to the upper end of the cylinder 7,-

will actuate the piston against the compression of the spring 10, and will under this normal pressure hold'the piston in'the de pressed position shown in Fig. 2. The position of the opposed balanced pistons 12 and 18in the cylinder ll will then be in a position to allow the water under pressure to pass through the pipe 2, the'cylinder 11, and through perforations 18 into an annular passage-19,'from-where-it is conveyed to the outlet 16 to the intake 17-on the hydraulic pump. The moment, however, that the pressure of the water main is reduced below the normal operating pressure, it canimmediately be seen t-hatthepr-essure in the upper end of the cylinder 7 will be sufliciently reduced to allow the iston. 8 to move into the position shown in Fig. 1. The movement of the piston 8 caused bythe expansion of the spring 10 by the corresponding reduction] of'pressureon the opposite side'o'f the piston from the lower position shown in Fig. 2,

to thep osition shown'in 1, is innnediately transmitted through the piston rod 9 to move thepistons 12 :and 13 into such a position that'the water passage through the cylinder -11 is cutofi' as'the'low er-piston 13 isinoved above the perforation 18 in the cylinder, so as to prevent the flow of water The sudden return through the cylinder. of normal pressure in the watermain A would in no way affect the automatic controlling mechanism, as the pressure supplied pressing therpiston rod?) into the position shown in Fig. 2, to allow the free passage of the water throughthe cylinder 11,and it will be necessary for the operator to hold the piston rod in this position until the .oil

pressure in the pipe line 4 has been'restored to the normal operating pressure, which being transmitted through the pipe '6, Wlll be operable to hold the piston 8 in this depressed positionagainst the pressure of the spring 10 a suitable extension or hand-grip vQObeing secured on the piston rod 9 between the upper cylinder 7 and-thelower cylinder 11 for thep-urpose of temporarily depressing the piston 8. V V a By referring to Fig. 3. of the drawings'it can be seen that'the device may be installed on any tluid pressurepipeline, and will be just aseflective to cut'otfthe' flow through the pipeline when connected with the pri- =mary pressure as by the pipe 22. The re ducticn of pressure in the pipe line -w'ould be transmitted through the pipe 22 to the upper end of the cylinder and allow the spring'to move the piston asutficientdisitance tocut cit the flow through the pipe iline.

The automatic cut out mechanism here shown issimple' and substantial in construcition, and always positive in its action, and

ltakes no more space-than similar devices. The materials and finish of the severatparts 0f the device are such as experience and jj-udgment' of the manufacturer may dictate.

I Wish it understoodthat various changes iin form and proportions or censtructionmay ibe resorted to within'the'scope of the apgpended claims and that I do not wish to llimi-t myself to the specific design here shown.

Having thus described my invention; what l1 claim and desire to secure by Letters !Patent, is

'1. An automatically-operated cut-oh valve lfor fluid conveying pipe lines, comprising an open-ended cylinder interposed on *the pipe line, inlet and-outlet openingstormed in the open-endedcylinder connecting the pipe line with the interior of the open-end ed cylinder, a pressure cylinder disposed in vline with the open-ende'd'cylinder, a piston in said pressure cylinder actuated by a spring on one sideand by pressure conveyed ifrom the discharge side of the open-ended cylinder on the other side, apiston rodextending flG HlSZllCl' piston through the open ended cylinder, a piston secured tosaidrod at a point above the intake in the open-ended cylinder, and apiston secured to the rod at a point below the discharge opening-formed iin the open-endedcylinder.

2. An automatic out out mec-hanismior ifiuid'actuatedapparatus comprising in comhinationa fluid pressure pipe line, an open "ended cylinder interposed in said pipe line,

a piston rod reeiprocably mounted in the open cylinder, a pair of balanced pistons mounted upon the rod within the cylinder, inlet and outlet openings connecting the pipe line with the interior of the cylinder, an actuating cylinder supported above the open ended cylinder into which the piston rod projects, a piston secured on the end of the rod, means for conveying fluid pressure from the discharge side of the open ended cylinder to the upper end of the cylinder, and a coil spring interposed between the lower end of the cylinder and the piston.

3. An automatic cut-oil mechanism for fluid-actuated apparatus, comprising in combination a cylinder, a piston slidably mounted in said cylinder, at pressure chamber formed in the cylinder on one side of said piston, a coil spring interposed between the lower end of the cylinder and the other side of the piston, a piston rod secured to said piston projecting through the lower end of the cylinder, a secondary open-ended cylin' der mounted below the first-named cylinder through which the piston rod projects, inlet and outlet openings formed in the openended cylinder connecting the interior of the cylinder with a source of fluid supply and a fluid-actuated mechanism, a piston secured to said rod at a point above the intake in the openended cylinder, a piston secured to the red at a point below the discharge opening formed in the open-ended cylinder, and a pipe connecting the discharge side of the open-ended cylinder with the pressure chan1- ber formed in the upper portion of the firstnamed cylinder.

4. An automatic cut-oft mechanism for fluid-actuated apparatus, comprising in combination a cylinder, a piston slid-ably mounted in said cylinder, a pressure chamber formed in the cylinder on one side of said piston, a coil spring interposed between the lower end of the cylinder and the other side of the piston, means for adjusting the tension of the spring, a piston rod secured to said piston projecting through the lower end of the cylinder, a secondary open-ended cylinder mounted below the first-named cylinder through which the piston rod projects, inlet and outlet openings formed in the open-ended cylinder connecting the interior of the cylinder with a source of fluid supply and a fluid-actuated mechanism, a

' piston secured to said rod at a point above the intake in the open-ended cylinder, a piston secured to the rod at a point below the discharge opening formed in the openended cylinder, and a pipe connecting the discharge side of the open-ended cylinder with the pressure chamber formed in the upper portion of the first-named cylinder.

5. An automatic cut-oil mechanism for fluid-actuated apparatus, comprising in combination a cylinder, a piston slidably mounted in said cylinder, a pressure chamber formed in the cylinder on one side of said piston, a coil spring interposed between the lower end of the cylinder and the other side of the piston, means for adjusting the tension of the spring, a piston rod secured to said piston projecting through the lower end of the cylinder, a secondary open-ended cylinder mounted below the first-named cylinder through which the piston rod projects, a casing surrounding the cylinder having an annular passage formed in its lower end which communicates with the interior of the cylinder through a series of perforations formed in the cylinder, an inlet opening communicating with the interior of the cylinder and the source of fluid supply, an outlet opening connected by a pipe with the fluid-actuated mechanism and the annular passage in the casing, valve means on the piston rod controlling communication between said inlet and outlet, a pipe connecting said pipe with the pressure chamber formed in the upper portion of the first-named cylinder, and manually actuated means secured on the piston rod between the upper cylinder and the open-ended cylinder by which the rod may be reciprocated.

6. An automatic cut-oil mechanism comprising the combination of a fluid pressure supply pipe, a valve cylinder having a lateral inlet to which the supply pipe is connected, said cylinder having a lateral outlet for fluid admitted from the supply pipe, a valve in the cylinder consisting of a piston rod carrying two spaced pistons separated a distance in excess of the distance between said inlet and outlet so that both the inlet and outlet may simultaneously open into the cylinder in the space between the pistons, and the rod and pistons having a limit of movement sufficient to move them to cut oil? communication between said inlet and outlet, means by which said pistons are normally positioned to cut oil communication between said inlet and outlet, means controlled by the pressure in the supply pipe to maintain said pistons in position with the inlet and outlet in communication, and means whereby on a reduction of pressure in the supply pipe below a predetermined point tlfe pistons are moved to interrupt communication between the inlet and outlet.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

JULIUS H. BECKER.

WVitnesses:

JOHN H. HnmuNo, lV. l/V. HEALnr.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

